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    <title>Document</title>
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    <div id="qs"></div>
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    <script type="text/babel">
        let flag = false;
        let dom = <h1>2</h1>
        let str;
        if (flag == true) {
            str = <h1>凯撒亮</h1>
        } else {
            str = <h1>凯撒暗</h1>
        }
        ReactDOM.render(
            <div>
                if  else{str}
                三目符{flag == true ? <h1>不动游星</h1> : <h1>十六夜秋</h1>}
            </div>
            ,
            document.getElementById('qs')
        )
        {/* <h1>你以为你打的是我的脸</h1> */ }
        {/* 你以为你打的是我的怪 */ }
    </script>
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